Manchester United crashed out of the League Cup with a defeat on penalties to Championship side Derby County on Tuesday after the third-round tie ended 2-2 in normal time at Old Trafford, reports Reuters.
With no extra-time in this season's competition, the contest went straight to spot kicks and Frank Lampard's Derby won 8-7 with Phil Jones's effort saved by visiting keeper Scott Carson.
For former England midfielder Lampard, who played under Mourinho at Chelsea, it was just reward for playing a full-strength side and approaching the game in positive fashion.
Derby had been moments away from winning 2-1 in normal time after United keeper Sergio Romero was sent off in the 67th minute but Marouane Fellaini got a stoppage-time equaliser.
United's rivals and League Cup holders Manchester City had no such trouble as they won 3-0 at Oxford United but top-flight Burnley went down 2-1 at third-tier Burton Albion.
United had taken the lead against Derby in the third minute with a well-placed shot from Juan Mata after Anthony Martial had burst down the left flank.
However, the visitors drew level in spectacular fashion after 59 minutes with a brilliant bending free-kick from Harry Wilson, the young Welsh winger on loan from Liverpool.
Manchester City's Gabriel Jesus was one of several big names in their lineup and scored after 36 minutes with a header before Riyad Mahrez and Phil Foden wrapped up proceedings late on.
Burnley picked up their first league win of the season at the weekend but came crashing to earth at League One Burton.
Goals from the home side's Liam Boyce and Jamie Allen cancelled out a first-half strike from Burnley's Kevin Long, and made sure Burton reached the fourth round for the first time.
